If you do not have a boost retard box set the LOCKED timing at 26-28deg to start power tuning.
Max WOT power spark timing will be 26(high boost) to 32deg (low boot) @WOT. on pump gas.
Excessive timing under boost on pump gas will break parts. Sneek up on the tune. Jetting and timing.

For initial start up-warm up idle to get it set up (idle mixture etc) use 36deg BTDC locked timing.
Then reduce for testing under power.

ok - explain what you been by locked timing ? and 36 d btdc locked timing ? i havent a dizzy and have to do everything by the way of imputting figures on a graph, i can change it exactly so not a problem - but i think you mean locked timing in the way of when i get to say 3000 rpm the timing curve is flat and for eg 36d btdc remains flat along the higher rev range so a flat ign line for that rev range being 3000 and above ?